Me. you very much! 15 points : )
how does a steam engine do work?
a. steam expands and spins an axle.
b. steam turns a turbine.
c. steam causes wheels to turn.
d. steam enters a cylinder and pushes a piston.

Scientists discovered fossils in several layers of the earth you see here. they found fossils of algae, snails, and clams in layer d. given that information, where do you think they found fossil evidence of simple land plants and amphibians?